This isn't a question its a comment about my first towing experience ever, done on a 2013, GMC Terrain SLE, AWD, 3.6L V6.
It all started when I decided I wanted a hitch receiver for my GMC. I originally wanted to buy the car with a receiver preinstalled but there were none in stock and so I had to settle for an after market install. After looking around online I decided that I wanted it "professionally done" but at a decent price. I purchased the receiver and install from uHaul. I figured the majority of my hauling will be done by uHaul trailers anyhow so who better to install it. First thing I did was learn some terms so I could talk to people semi-intelligently, I knew nothing of towing or receivers or ever towed anything before diving in. Google uHaul hitch glossary, that helped a lot.
They did a good job installing the receiver (btw it was a Curt brand receiver) itself but I wasn't overly impressed with the break/turn light wiring harness. They ended up wiring into the driver side taillight and getting in there they did a good job of taking things apart and putting things back together. My only real issue was a hanging harness (it's unsecured), the wires are exposed to the environment (seen people with tube coverings for wire protection, and the fact that I can see the ends of all the zap straps they used under my car to run the wire from the back of the car to the engine compartment. I mean at least cut the straps so u cant notice them. I like the fact that the bumper was designed to accommodate a receiver. No cutting required, this thing popped off the bottom of the bumper and the receiver sits there all pretty like, you cant even see the uhaul logo on the tube of the receiver. To solve the hanging wire harness issue I bought a securing kit from etrailer (18140 & 18144) I am awaiting its arrival in the mail.
The hitch I bought was a Class 3 square tube, most sites say class 3 is rated for 4000 lbs but the uHaul site says its rated for 5000 lbs. Either way the GMC website says the Terrain can only tow 3500 lbs so I guess its a moot point.
Looking at the receiver I realized it was kinda low to the ground. I called uHaul and asked them what the best ball height would be for the trailer's coupler. For the 6x12 trailer (dual axel) its 17 inches but the trailers are good for almost any distance with a cap of 25 inches. Since the middle of the receiver was sitting around 13 inches I felt inclined to get a insert and ball that would raise it to ~17 inches. I went to NAPA and all I saw were inserts with 2 inch drops nothing that brought it up. I asked the guy for help and he kinda laughed at me and told me to take the dropped insert, turn it upside down, and install the ball on the top end. I bought the insert with the ball mount (a 2 inch ball because that's what uHaul's trailers support) and I asked the shop guys at work to reverse the ball. I personally didn't have the tools to do it. I installed it and bam, it was almost a perfect 17 inches high.
I was ready to tow. I needed help securing the trailer to the car as I had never done it before. The backup camera was a big help in positioning the Terrain as close to the coupler as possible. For sure a learning experience. Two things I learnt I should keep in my car. Paper towels and heavy duty gloves. My first tow went great. I probably towed 2000 lbs including the weight of the trailer. Car took it like a champ. No issues going up hills starting or stopping. You just have to give yourself way more breaking room when slowing down. I even managed to backup the trailer 6 foot wide trailer (which is more like 11 feet wide if you include the wheels sticking out) into a 13 foot wide space. It took about 15 minutes but I got it!
Anyhow, if any newbies have any questions about towing please feel free to ask.